402001210 has 64 divisors (see below), whose sum is σ = 833734944. Its totient is φ = 138240000.

The previous prime is 402001147. The next prime is 402001241. The reversal of 402001210 is 12100204.

It can be written as a sum of positive squares in 16 ways, for example, as 49575681 + 352425529 = 7041^2 + 18773^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222310 + ... + 224110.

Almost surely, 2^402001210 is an apocalyptic number.

402001210 is an abundant number, since it is smaller than the sum of its proper divisors (431733734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402001210 is a wasteful number, since it uses less digits than its factorization.

402001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 402001210 is about 20049.9678303981. The cubic root of 402001210 is about 738.0330096892.

Adding to 402001210 its reverse (12100204), we get a palindrome (414101414).

The spelling of 402001210 in words is "four hundred two million, one thousand, two hundred ten".